CS-3510 15 E S F

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Operator’s Manual CS-3510 CHAIN SAW - Acme Tools

Manual CS-3510 CHAIN SAW The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Read and understand all provided literature before use. Failure to do so could result in serious injury. Note: This product complies with CAN ICES-2/NMB-2.

PDF Operator's Manual CS-3510 CHAIN SAW

Authorized ECHO Service Dealer, or by contacting ECHO Incorporated 400 Oakwood Road, Lake Zurich, IL 60047 1-800-432-ECHO (3246). PACKING LIST The ECHO product you purchased has be en factory pre-assembled for your convenience. Due to packaging restrictions, some assembly may be necessary. After opening the carton, check for damage.

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Operator's Manual CS-3510
CHAIN SAW
The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
Read and understand all provided literature before use. Failure to do so could result in serious injury. Note: This product complies with CAN ICES-2/NMB-2.
X7503360201 © 8/20 ECHO Incorporated

TABLE OF CONTENTS

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TABLE OF CONTENTS

Table of Contents ........................................................................................ 2 Introduction ................................................................................................. 4 Servicing Information .................................................................................. 4
Parts/Serial Number............................................................................. 4 Service ................................................................................................. 5 ECHO Consumer Product Support ...................................................... 5 Product Registration ............................................................................ 5 Additional Literature ............................................................................. 5 Packing List................................................................................................. 5 Safety .......................................................................................................... 6 Rules For Safe Operation .................................................................... 6 Correct Use Of Chain Brake ................................................................ 7 Personal Condition and Safety Equipment ........................................ 12 International Symbols ........................................................................ 17 Manual Safety Symbols and Important Information ........................... 18 Emission Control (Exhaust & Evaporative) .............................................. 20 CARB And EPA Emissions Control Information ................................. 20 Description ................................................................................................ 21 Preparation For Use........................................................................... 23 Operation .................................................................................................. 26 Fuel .................................................................................................... 26 Chain Lubricant.................................................................................. 29 Winter Operation................................................................................ 31 Starting Cold Engine .......................................................................... 31 Starting Warm Engine........................................................................ 32 Running ............................................................................................. 33 Stopping............................................................................................. 34 Checking Chain Tension .................................................................... 35 Chain Lubrication Test ....................................................................... 35 Cutting Instructions ............................................................................ 35 Chain And Guide Bar Combination .................................................... 40 Kick GuardTM .................................................................................... 40 Guide Bar........................................................................................... 40 Saw Chain ......................................................................................... 41

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TABLE OF CONTENTS

Maintenance ............................................................................................. 41 Skill Levels ........................................................................................ 42 Maintenance Intervals ....................................................................... 42 Carburetor Adjustment....................................................................... 44 Air Filter ............................................................................................. 45 Spark Plug ......................................................................................... 45 Check Fuel System ........................................................................... 46 Fuel Filter .......................................................................................... 46 Oil Filter ............................................................................................. 47 Guide Bar .......................................................................................... 47 Sprocket ............................................................................................ 47 Cooling System Cleaning .................................................................. 48 Spark Arrestor Muffler........................................................................ 48 Spark Arrestor Screen ....................................................................... 48 Exhaust Port Cleaning....................................................................... 49 Setting The Saw Chain...................................................................... 50
Troubleshooting ........................................................................................ 53 Storage ..................................................................................................... 55
Storage After Use .............................................................................. 55 Specifications ........................................................................................... 56 Notes ........................................................................................................ 57
Product Registration ..................................................................................58

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INTRODUCTION

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INTRODUCTION

Specifications, descriptions and illustrative material in this literature are as accurate as known at the time of publication, but are subject to change without notice. Illustrations may include optional equipment and accessories, and may not include all standard equipment.
Read and understand all provided literature. Literature contains specifications and information for safety, operation, maintenance, storage, and assembly specific to this product. Scan QR codes for more information. For additional literature, including safety manuals where applicable, or questions regarding terms used in this manual, visit: https://www.echo-usa.com/manuals OR

https://www.shindaiwa-usa.com/manuals

SERVICING INFORMATION
Parts/Serial Number
Genuine ECHO Parts and Assemblies for your ECHO products are available only from an Authorized ECHO Dealer. When you do need to buy parts always have the Model Number and Serial Number of the unit with you. For future reference write them in the space provided below. Model No. _______________ Serial No. _______________

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PACKING LIST

Service
Service of this product during the warranty period must be performed by an Authorized ECHO Service Dealer. For the name and address of the Authorized ECHO Service Dealer nearest you, ask your retailer or call: 1-800-432-ECHO (3246). Dealer information is also available on our Web Site www.echo-usa.com. When presenting your unit for Warranty service/ repairs, proof of purchase is required.

ECHO Consumer Product Support
If you require assistance or have questions concerning the application, operation, or maintenance of this product, call the ECHO Consumer Product Support Department at 1-800-432-ECHO (3246) from 8:00 am to 5:00 pm (Central Standard Time) Monday through Friday. Before calling, please know the model and serial number of your unit.

Product Registration
Register your ECHO equipment on-line at www.echo-usa.com or by filling out the product registration sheet included in this manual. Registering your product confirms warranty coverage and provides a direct link to ECHO if we find it necessary to contact you.

Additional Literature
In addition to finding information online, information is available from your Authorized ECHO Service Dealer, or by contacting ECHO Incorporated 400 Oakwood Road, Lake Zurich, IL 60047 1-800-432-ECHO (3246).

PACKING LIST
The ECHO product you purchased has been factory pre-assembled for your convenience. Due to packaging restrictions, some assembly may be necessary. After opening the carton, check for damage. Immediately notify your retailer or ECHO Dealer of damaged or missing parts. Use the contents list to check for missing parts.
1 Power Head 1 Operator's Manual 1 Warranty Statement 1 Guide Bar 1 Saw Chain

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SAFETY
SAFETY
Rules For Safe Operation
Kickback Safety Precautions for Chain Saw Users

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KICKBACK may occur when the nose or tip of the guide bar touches an object, or when the wood closes in and pinches the saw chain in the cut.

Tip contact in some cases may cause a lightning fast reverse REACTION, kicking the guide bar up and back towards the operator. Pinching the saw chain along the top of the guide bar may push the guide bar rapidly back towards the operator. Either of these reactions may cause you to lose control of the saw which could result in serious personal injury.

Rotational kickback

The optional Kick GuardTM device is not installed on the guide bar when you purchase your chain saw. The optional Kick GuardTM can be used in a majority of cutting operations, and is especially recommended for beginners, homeowners, or chain saw novices. Most cutting operations can be accomplished with the optional Kick GuardTM in place.

Rotational kickback Chain moving downward at impact

Do not rely exclusively upon the safety devices built into your saw. As a chain saw user, you should take several steps to keep your cutting jobs free from accident or injury.

1. With a basic understanding of kickback, you can reduce or eliminate the element of surprise. Sudden surprise contributes to accidents.

Kickback Danger Zone

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SAFETY

2. Keep a good firm grip on the saw with both hands, the right hand on the rear handle, and the left hand on the front handle, when the engine is running. Use a firm grip with thumbs and fingers encircling the chain saw handles. A firm grip will help you reduce kickback and maintain control of the saw. Don't let go.

3. Make sure that the area in which you are cutting is free from

Linear kickback

obstructions. Do not let the nose

of the guide bar contact a log,

branch, or any other obstruction

which could be hit while you are

operating the saw.

Kickback

4. Cut at high engine speeds.

Pinch

5. Do not overreach or cut above shoulder height.

6. Follow manufacturer's sharpening and maintenance instructions for the saw chain.

7. Only use replacement bars and chains specified by the manufacturer or the equivalent.

Correct Use Of Chain Brake

Chain Brake Operation · Set the lever in the unlocked position before starting to cut.

· If the brake is tripped by kickback reaction, the chain will stop immediately. Release the throttle to avoid possible damage to the engine or clutch.

Unlocked

· Do not attempt to operate the engine with the brake locked.

Testing The Brake · Start the engine on a solid level
surface and run at a fast idle until warm.

Locked

· Hold the saw firmly by the handles and accelerate the engine to a fast idle.

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SAFETY

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· Slowly operate the chain brake lever while holding the saw firmly on the ground. When the brake lever trips, the chain should stop. Immediately release the throttle trigger.

Do not allow the saw to tip forward in order to avoid damage to the chain.
If the chain does not stop immediately, return the saw to your authorized dealer for repair. Note:
· For practice, while cutting a small tree, push the lever forward to lock the brake.
· Confirm that the brake works properly before each use. · If the chain brake is clogged with wood chips, function of the brake may
deteriorate. Always keep the device clean. · Do not increase engine RPM while the chain brake is locked. Do not use a bar and chain combination other than those specified in this manual. For your own safety, do not remove the chain brake system. The installation of a chain brake may be mandatory by law or as stipulated by insurance regulations in your area of operation. You should inquire through local government offices, your employer or your local dealer to ensure that your chain saw conforms to the required safety standard. Chain brakes have been designed and tested to comply with international safety standards as follows: USA: ANSI Standard B175.1 Safety Requirement for chain saws Canada: CSA Standard Z62.1, Z62.3

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ANSI Standard B175.1 and CSA Z62.1.3 stipulate that the brake shall stop the chain 0.12 seconds at an engine speed of 13,500 r/min. It is the responsibility of the owner/ operator to ensure that the brake is serviced, adjusted and tested strictly in accordance with the instructions as detailed here in order to ensure that the brake performance is maintained in compliance with the Standards B175.1 and CSA Z62.1.3

SAFETY
35 cm (14 in.)

Automatic Chain Brake Kickback produced from the tip of the guide bar will trip the automatic chain brake. To make sure that the automatic chain brake operates properly, follow these steps: 1. Stop the engine. 2. Hold the saw with the guide bar approximately 35 cm (14 inches) above
a wooden surface. Right hand should hold the rear handle, and left hand should hold the front handle. 3. Release the front handle and drop the end of the guide bar against the wooden surface. 4. The impact should lock the chain brake.
When checking the operation of the automatic chain brake, use a soft surface substance like wood to absorb the impact so the chain is not damaged.

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SAFETY

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Other Safety Precautions
1. Do not operate a chain saw with one hand! Serious injury to the operator, helpers, bystanders, or any combination of these persons may result from one-handed operation. A chain saw is intended for twohanded use.
2. Do not operate a chain saw when you are fatigued. 3. Use safety footwear, snug-fitting clothing and protective gloves. Wear
eye, hearing, and head protection devices. 4. Use caution when handling fuel. Move the chain saw at least 3 m (10
feet) from the fueling point before starting the engine. 5. Do not allow other persons to be near the chain saw when starting or
cutting with the chain saw. Keep bystanders and animals out of the work area. 6. Do not start cutting until you have a clear work area, secure footing, and a planned retreat path from the falling tree. 7. Keep all parts of your body away from the saw chain when the engine is running. 8. Before you start the engine, make sure that the saw chain is not contacting anything. 9. Carry the chain saw with the engine stopped, the guide bar and saw chain to the rear, and the muffler away from your body. 10. Do not operate a chain saw that is damaged, improperly adjusted, or not completely and securely assembled. Be sure that the saw chain stops moving when the throttle control trigger is released. 11. Shut off the engine before setting the chainsaw down. 12. Use extreme caution when cutting small size brush and saplings because slender material may catch the saw chain and be whipped toward you or pull you off balance. 13. When cutting a limb that is under tension, be alert for spring-back so that you will not be struck when the tension in the wood fibers is released. 14. Keep the handles dry, clean, and free of oil or fuel mixture. 15. Operate the chainsaw only in well ventilated areas. 16. Do not operate a chainsaw in a tree unless you have been specifically trained to do so. 17. All chain saw service, other than items listed in the Operator's manual maintenance instructions, should be performed by competent service personnel. (For example, if improper tools are used to remove the flywheel or if an improper tool is used to hold the flywheel in order to remove the clutch, structural damage to the flywheel could occur and could subsequently cause the flywheel to burst.)

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SAFETY

18. When transporting your chain saw, use the appropriate guide bar scabbard.
19. A spark arrestor muffler approved to SAE Standard J335 is standard on this chain saw to reduce the possibility of forest fires. Do not operate the chain saw with a loose or defective muffler. Do not remove the spark arrestor screen.
20. When using a chainsaw a fire extinguisher should be available. 21. When felling, keep at least 2 tree lengths between yourself and your
fellow workers. 22. Follow instructions in your operator's manual for starting the chain saw. 23. Never adjust the guide bar or sawchain with the engine operating. 24. When boring with the chainsaw, the initial cut should be introduced with
the lower part of the nose (tip) until the hole is sufficiently large so as to introduce the entire nose (tip) of the guide bar. This technique should reduce the danger of kickback. 25. Allow your chainsaw to cool before refueling, and do not smoke while refueling.

Chain saws shall be used in accordance with the operating instructions and safety precautions listed in the operator's manual(s). It shall be the responsibility of the owner to see that such instructions and precautions are given to every operator who uses the saw.

During operation, the muffler or catalytic muffler and surrounding cover become hot.
Never suspend the saw on a lanyard with the engine running.
Always use the saw from the right-hand side of your body NEVER from the left side.
Always wear proper safety clothing to protect your lower body from sharp saw chain and hot muffler.
Always keep exhaust area clear of flammable debris during transportation or when storing, otherwise serious property damage or personal injury may result.

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SAFETY

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Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings.
ALWAYS stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit.
DO NOT start or operate unit unless all guards and protective covers are properly assembled to unit.
NEVER reach into any opening while the engine is running. Moving parts may not be visible through openings.
Using improper replacement components or removing safety devices may result in serious or fatal injury.
Unit includes safety devices that reduce the likelihood of kickback:
Chain brake - brake actuated by kickback energy, not manual activation.
Reduced-kickback guide bar - reduced nose radius guide bar.
Low-kickback saw chain - saw chain that meets ANSI kickback performance requirements when configured with the bar/chain recommendations in this manual.
Front hand guard - a structural barrier between the front handle of a chain saw and the guide bar.
Periodically Check fuel system (fuel lines, vent, grommet, fuel tank, and fuel cap) for leaks especially if the unit is dropped. If damage or leaks are found, do not use unit, otherwise serious personal injury or property damage may occur. Have unit repaired by an authorized servicing dealer before using.
Personal Condition and Safety Equipment

Cancer and Reproductive Harm 12

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© 8/20 ECHO Incorporated

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www.P65Warnings.ca.gov

SAFETY

The muffler or catalytic muffler and surrounding cover may become extremely hot. Always keep clear of exhaust and muffler area, otherwise serious personal injury might occur.

Users of this product risk injury to themselves and others if the unit is used improperly and/or safety precautions are not followed. Proper clothing and safety gear must be worn when operating unit.
Physical Condition Your judgment and physical dexterity may not be good: · If you are tired or sick · If you are taking medication · If you have taken alcohol or drugs Operate unit only if you are physically and mentally well.
Eye Protection
Eye protection that meets ANSI Z87.1 or CE requirements must be worn whenever you operate the unit.
For additional safety, a full-face shield can be worn over safety glasses or goggles to provide protection from sharp branches or flying debris.
Hand Protection Wear sturdy, no-slip, rubber work gloves to improve your grip on the handles. Gloves also provide protection against cuts and scratches, cold environments, and reduce the transmission of machine vibration to your hands.

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SAFETY

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Hearing/Ear Protection ECHO recommends wearing personal protective equipment whenever unit is used.
Breathing Protection Operators who are sensitive to dust or other common airborne allergens may need to wear a dust mask to prevent inhaling these materials while operating unit. Dust masks can provide protection against dust, plant debris, and other plant matter such as pollen. Make sure the mask does not impair your vision, and replace the mask as needed to prevent air restrictions.
Proper Clothing Wear snug-fitting, durable clothing: · Pants should have long legs, shirts should have long sleeves. · DO NOT WEAR SHORTS. · DO NOT WEAR TIES, SCARVES, JEWELRY, or clothing with loose or
hanging items that could become entangled in moving parts or surrounding growth. · Keep clothing buttoned or zipped, and keep shirt tails tucked in. · Wear sturdy work shoes with nonskid rubber soles. · DO NOT WEAR OPEN TOED SHOES. · DO NOT OPERATE UNIT WITH BARE FEET. Keep long hair away from engine and air intake. Retain hair with cap or net. Heavy protective clothing can increase operator fatigue, which may lead to heat stroke. Schedule heavy work for early morning or late afternoon hours when temperatures are cooler.

The components of this machine generate an electromagnetic field during operation, which can interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with pacemakers should consult with their physician and the pacemaker manufacturer before operating this machine. In the absence of such information, ECHO does not recommend the use of this machine by anyone who has a pacemaker.

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Extended Operation / Extreme Conditions

SAFETY

Prolonged exposure to cold and/or vibration can result in injury. Read and follow all safety and operation instructions to minimize risk of injury. Failure to follow instructions can result in painful wrist/hand/arm injuries. It is believed that a condition called Raynaud's Phenomenon, which affects the fingers of certain individuals, may be brought about by exposure to vibration and cold. Exposure to vibration and cold may cause tingling and burning sensations, followed by loss of color and numbness in the fingers. The following precautions are strongly recommended, because the minimum exposure, which might trigger the ailment, is unknown.
· Keep your body warm, especially the head, neck, feet, ankles, hands, and wrists.
· Maintain good blood circulation by performing vigorous arm exercises during frequent work breaks, and also by not smoking.
· Limit the hours of operation. Try to fill each day with jobs where operating the unit or other hand-held power equipment is not required.
· If you experience discomfort, redness, and swelling of the fingers followed by whitening and loss of feeling, consult your physician before further exposing yourself to cold and vibration.
Repetitive Stress Injuries (RSI) It is believed that overusing the muscles and tendons of the fingers, hands, arms, and shoulders may cause soreness, swelling, numbness, weakness, and extreme pain in those areas. Certain repetitive hand activities may put you at a high risk for developing a Repetitive Stress Injury (RSI). An extreme RSI condition is Carpal Tunnel Syndrome (CTS), which could occur when your wrist swells and squeezes a vital nerve that runs through the area. Some believe that prolonged exposure to vibration may contribute to CTS. CTS can cause severe pain for months or even years.

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SAFETY

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To reduce the risk of RSI/CTS, do the following: · Avoid using your wrist in a bent,
extended, or twisted position. Instead try to maintain a straight wrist position. Also, when grasping, use your whole hand, not just the thumb and index finger. · Take periodic breaks to minimize repetition and rest your hands. · Reduce the speed and force with which you do the repetitive movement. · Do exercises to strengthen the hand and arm muscles. · Immediately stop using all power equipment and consult a doctor if you feel tingling, numbness, or pain in the fingers, hands, wrists, or arms. The sooner RSI/CTS is diagnosed, the more likely permanent nerve and muscle damage can be prevented.

All over head electrical conductors and communications wires can have electricity flow with high voltages. This unit is not insulated against electrical current. Never touch wires directly or indirectly, otherwise serious injury or death can result.
Do not operate this product indoors or in inadequately ventilated areas. Engine exhaust contains poisonous emissions and can cause serious injury or death.

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International Symbols

Symbol

Description WARNING! Read and follow all safety precautions in the instruction manual. Failure to follow instructions could result in serious personal
injury.

Wear Eye, Ear and Head Protection

Tip contact may cause the guide bar to move suddenly upward and backward, which may cause serious injury

Contact of the guide bar tip with any object should be avoided

Both of the operator's hands must be used to operate the chain saw

Symbol
H T L

SAFETY
Description Carburetor Adjustment - High Speed Mixture Carburetor Adjustment - Idle
Speed Carburetor Adjustment - Low Speed Mixture Measured maximum kickback value, without brake, for approved bar and chain combinations. Fuel and Oil Mixture

Hot Surface

Chain Oil Fill

Chain Brake Operation

Chain Oiler Adjustment

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SAFETY
Symbol

Description

Symbol

Choke Control "COLD START" Position (Choke Closed)
Choke Control "RUN" Position (Choke Open)

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Description
Purge Pump

De-Compression Device

STOP STOP

STOP / Momentary STOP Switch

Note: Not all symbols will appear on your unit.

Manual Safety Symbols and Important Information
Throughout this manual and on the product itself, you will find safety alerts and helpful, informational messages preceded by symbols or key words. The following is an explanation of those symbols and key words and what they mean to you.

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SAFETY

The safety alert symbol accompanied by the word "DANGER" calls attention to an act or condition which WILL lead to serious personal injury or death if not avoided.
The safety alert symbol accompanied by the word "WARNING" calls attention to an act or condition which CAN lead to serious personal injury or death if not avoided.
The safety alert symbol accompanied by the word "CAUTION" calls attention to an act or condition which might lead to minor or moderate personal injury if not avoided.
The enclosed message provides information necessary for the protection of the unit. Note: This enclosed message provides tips for use, care and
maintenance of the unit. CIRCLE AND SLASH SYMBOL This symbol means the specific action shown is prohibited. Ignoring these prohibitions can result in serious or fatal injury.

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EMISSION CONTROL
EMISSION CONTROL (EXHAUST & EVAPORATIVE)

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CARB And EPA Emissions Control Information
The emission control system for the engine is EM (engine modification) and, if the second to last character of the Engine Family on the Emission Control Information label (sample below) is "B", "C", "K", or "T", the emission control system is EM and TWC (3way catalyst). The fuel tank/fuel line emission control system is EVAP (evaporative emissions). Evaporative emissions for California models are only applicable to fuel tanks and fuel feed lines. An Emission Control Label is located on the engine. (This is an EXAMPLE ONLY, information on label varies by engine FAMILY). Product Emission Durability (Emission Compliance Period)
The 50 or 300 hour emission compliance period is the time span selected by the manufacturer certifying the engine emissions output meets applicable emissions regulations, provided that approved maintenance procedures are followed as listed in the Maintenance Section of this manual.

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DESCRIPTION

Locate the safety decal(s) on your unit. Make sure the decal(s) is legible and that you understand and follow the instructions on it. If a decal cannot be read, a new one can be ordered from your ECHO dealer. Safety label is for example only. Your label my appear slightly different.

3 2
1

16A0CD3757 91PX57CQ
Manual shows other combinations. Manuel montre d' autres combinaisons.
Max 45

X5050009390

11 12
13 14
15 19 18 17 16
X5050009390

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DESCRIPTION

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1. Rear Hand Guard 2. Purge Pump 3. Choke Control Knob 4. Chain Brake Lever/Front Hand Guard 5. Spark Arrestor Muffler Or Spark Arrestor Muffler With Catalyst 6. Saw Chain 7. Guide Bar 8. Chain Catcher 9. Chain Tension Adjuster 10. Chain Brake/Sprocket Guard 11. Cylinder Cover 12. Spark Plug 13. Throttle Trigger Lockout 14. Rear Handle - For The Right Hand 15. Throttle Trigger 16. Momentary STOP Switch 17. Cylinder Cover Latch 18. Fuel Tank Cap 19. Starter Handle 20. Front Handle - For The Left Hand 21. Oil Tank Cap
CHAIN SAW TERMS · FAST IDLE -Throttle setting that causes engine to operate at a faster
speed for easier starting.
· THROTTLE LATCH - Device that sets idle speed to fast idle when choke control is operated.
· CHAIN BRAKE - Stops the saw chain.
· DRIVE SPROCKET - Drives saw chain.
· CLUTCH - Turns drive sprocket when engine rpm is fast enough to provide the power needed for cutting.

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CS-3510 Preparation For Use

DESCRIPTION

Saw chain is sharp! Always wear gloves when handling assembly, otherwise serious personal injury may result.
Note: The machine may be delivered with guide bar, tip guard, and saw chain separated. Install guide bar, tip guard, and saw chain as follows.

Instructions to Install Optional Kick GuardTM to Bar

Tools Needed: Two 11 mm (7/16 in.) Wrenches.

Optional
Kick GuardTM A

1. Install bolt (A) in rear hole (B) of tip

guard and through front hole (C) in

guide bar.

2. IMPORTANT: Dimple (D) in tip guard must engage recess (E) in guide bar.

3. Securely tighten nut (F) and bolt (A).

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DESCRIPTION

Guide Bar and Saw Chain Installation/Removal

1. Release the cylinder cover

latches (A) by inserting the screw driver end of the supplied tool (B)

and lifting the latch tip as shown.

Remove the cylinder cover (C).

2. Remove spark plug lead.

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A C

Remove sprocket guard nuts (D) and remove sprocket guard (E).

Unlock Chain Brake

4. Remove guide bar (F) and saw

chain if necessary.

Note: See "Maintenance and

Care" section for guide bar/

saw chain maintenance

procedures.

5. Unlock the chain brake.

6. Mount guide bar (F) and saw chain on guide bar studs (G) and slide toward sprocket (H) to make saw chain installation easier. Install chain with cutters on top of guide bar facing forward.

7. Install the sprocket guard (E)

over the guide bar studs (G).

Make sure chain tension adjuster

pin (I) fits into the guide bar

adjuster hole (J). Tighten

sprocket guard nuts (D) finger

tight.

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8. Adjust saw chain tension, as instructed in "Adjustment, Chain Tension".

DESCRIPTION

Adjusting Chain Tension

Always loosen sprocket guard nuts before turning the chain tension adjuster, otherwise the sprocket guard and tensioner will be damaged.

1. Release the cylinder cover

latches (A) by inserting the screw driver end of the supplied tool (B)

and lifting the latch tip as shown.

Remove the cylinder cover (C).

2. Remove spark plug lead. 3. Unlock chain brake.

A C

4. Loosen sprocket guard nuts (D).
C

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25

OPERATION
5. Hold the bar nose up, and turn the adjuster screw (E) clockwise until chain contacts underside of the bar.
6. Tighten sprocket guard nuts (D) with the bar nose held up.
7. Pull the chain around the bar by hand. Loosen the adjustment if you feel tight spots.

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Tighten sprocket guard nuts to 20-23 N·m (175-200 in·lbf). DO NOT over-tighten nuts. Damage to saw may result. 8. Assemble components in reverse order. 9. Keep chain properly tensioned at all times. Note: All chains require frequent adjustments.
OPERATION
Fuel

Diesel fuels and alternative fuels, such as E-15 (15% ethanol), E-85 (85% ethanol) or any fuels not meeting ECHO requirements are NOT approved for use in ECHO 2-stroke gasoline engines. Use of diesel or alternative fuels can cause performance problems, loss of power, overheating, fuel vapor lock, and unintended machine operation, including, but not limited to, improper clutch engagement. Diesel or alternative fuels can also cause premature deterioration of fuel lines, gaskets, carburetors and other engine components.

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OPERATION

Fuel Requirements Gasoline - Use fresh (purchased within the last 30 days from the pump) 89 Octane [R+M/2] (mid grade or higher) gasoline known to be good quality. Gasoline may contain up to 10% Ethanol (grain alcohol) or 15% MTBE (methyl tertiary-butyl ether). Gasoline containing methanol (wood alcohol) is NOT approved. Use of ECHO branded fuel is recommended to extend engine life in all air-cooled 2-stroke and 2/4-stroke hybrid engines. Two Stroke Oil - A two-stroke engine oil, such as ECHO branded 2-stroke oils, meeting ISO-L-EGD (ISO/CD 13738) and J.A.S.O. FD Standards must be used. ECHO branded 2-stroke oils meet these standards. Engine problems due to inadequate lubrication caused by failure to use an ISO-LEGD (ISO/CD 13738) and J.A.S.O. M345-FD certified oil will void the twostroke engine warranty.

2-Stroke engine oil contains petroleum distillates and other additives that may be harmful if swallowed. Heated oil can release vapors that can cause flash fire, or ignite with explosive force. Read and follow the oil manufacturer's instructions, and observe all safety warnings and precautions for handling flammable liquids. For more detailed safety and first aid information, visit www.echo-usa.com for a copy of the Material Safety Data Sheet.
KEEP OUT OF REACH OF CHILDREN. If swallowed, do not induce vomiting. CALL PHYSICIAN OR
A POISON CONTROL CENTER IMMEDIATELY. WEAR SAFETY GLASSES when mixing or handling. AVOID repeated or prolonged skin contact. AVOID inhaling oil mists or vapors.
ECHO branded 2-stroke oils may be mixed at 50:1 ratio for application in all ECHO engines sold in the past regardless of ratio specified in those manuals.
Handling Fuel

Fuel is VERY flammable. Use extreme care when mixing, storing or handling, or serious personal injury will result.

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Use an approved fuel container. Mark fuel containers as containing 2-stroke mixture fuel.
DO NOT smoke near fuel. DO NOT allow flames or sparks near fuel. Fuel tanks/cans may be under pressure. Always loosen
fuel caps slowly allowing pressure to equalize. NEVER refuel a unit when the engine is HOT or RUNNING! DO NOT fill fuel tanks indoors. ALWAYS fill fuel tanks
outdoors over bare ground. DO NOT overfill fuel tank. Wipe up spills immediately. Securely tighten fuel tank cap and close fuel container
after refueling. Inspect for fuel leakage. If fuel leakage is found, do not
start or operate unit until leakage is repaired. Move at least 3 m (10 ft.) from refueling location before
starting the engine.

Gasoline vapor is heavier than air, and can travel along the ground to nearby sources of ignition such as electrical motors, pilot lights, and hot or running engines. Vapors ignited by an ignition source can flash back to the fuel container, resulting in an explosion, fire, serious or fatal injuries, and extensive property damage.
Mixing Instructions

Stored fuel ages. Do not mix more fuel than you expect to use in 30 days, 90 days when a fuel stabilizer is added.

1. Fill an approved fuel container with half of the required amount of gasoline.
2. Add the proper amount of 2-stroke oil to gasoline.
3. Close container and shake to mix oil with gasoline.

Fuel to Oil Mix 50:1 Ratio

Metric

Gas

Oil

Gas

Oil

gal. fl.oz.

2.6

100

4. Add remaining gasoline, close

5.2

200

fuel container, and remix.

500

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Spilled fuel is a leading cause of hydrocarbon emissions. Some locations may require the use of automatic fuel shut-off containers to reduce fuel spillage.
Storage - Fuel storage laws vary by locality. Contact your local government for the laws affecting your area. As a precaution, store fuel in an approved, airtight container. Store in a well-ventilated, unoccupied building, away from sparks and flames.
· Empty the fuel tank prior to storing the unit. Return unused fuel to an approved fuel storage container.

Stored two-stroke fuel can separate. ALWAYS shake fuel container thoroughly before each use.
Used oil and gasoline, and soiled towels are hazardous waste materials. Disposal laws vary by locality.

Units equipped with a momentary STOP Switch automatically return to RUN position. Engine can start unintentionally. Always remove spark plug lead from spark plug before assembling or performing maintenance procedures, otherwise, serious personal injury can result.

Servicing Fuel and Oil When the fuel tank cap or oil tank cap is difficult to remove, remove the spark plug lead, pull the starter handle slowly, and use the starter handle to assist in removal of the cap.

Chain Lubricant
Note: Cap indication - Fuel/oil tanks are indicated by the following illustrations
Proper lubrication of the chain while in operation reduces friction between the chain and the guide bar to a minimum and assures a longer service life.

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· Use bar and chain oil of high quality for this purpose.
· Do not use used or reclaimed oil to avoid various oiler problems.
· Use high quality bar and chain oil. · Use bar and chain oil of the
following grades: · SAE No. 30....in summer · SAE No. 10....in winter or when cutting resinous trees.
· When refueling, also refill chain oil.

CS-3510
Fuel tank cap
Oil tank cap

Moving parts can amputate fingers or cause severe injuries. Keep hands, clothing and loose objects away from all openings. Always stop engine, disconnect spark plug, and make sure all moving parts have come to a complete stop before removing obstructions, clearing debris, or servicing unit.
Engine exhaust IS HOT, and contains Carbon Monoxide (CO), a poison gas. Breathing CO can cause unconsciousness, serious injury, or death. Exhaust can cause serious burns. ALWAYS position unit so that exhaust is directed away from your face and body.
Operation of this equipment may create sparks that can start fires around dry vegetation. This unit is equipped with a spark arrestor to prevent discharge of hot particles from the engine. Metal cutters can also create sparks if the cutter strikes rocks, metal, or other hard objects. Contact local fire authorities for laws or regulations regarding fire prevention requirements.

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Winter Operation

Air cleaner cover - Use the winter plug (A) to prevent carburetor trouble in winter.

· Remove air cleaner cover. Remove winter plug (A) from warm weather position (B), and install into cold weather position (C).

Note: For operation at normal

temperature (5°C [41°F]) return the plug to its

original position. To

prevent over heating of the

engine.

Starting Cold Engine

OPERATION
A B

Make sure the bar and chain are free from any obstruction when starting the chain saw.

1. Move chain brake lever fully FORWARD to LOCK chain brake before starting.

Chain Brake Locked

2. Fill the fuel tank with fuel mixture. Do not over fill.

3. Fill the chain oil tank with lubricant. Do not over fill.

4. Push purge pump (A) 3 to 5 times or until fuel is visible in purge pump.
5. Pull choke control knob (B) all the way OUT (CLOSED [ ] choke position).

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After choke control knob is pulled and then knob is returned to original position, throttle remains slightly open (fast idle latch condition).
The chain will attempt to move when engine is started with fast idle throttle latch engaged.
Do not start engine before chain brake is locked. 6. Securely hold the chain saw and pull starter handle several times until
first starting sound. 7. Push choke control knob (B) all the way IN (OPEN choke position). 8. Pull starter handle to start the
engine. Note: Do not pull starter rope out to
the maximum possible position. Note: Do not allow recoil handle to snap back against the casing. Note: If engine does not start after 5 pulls, repeat instructions.
After starting the engine, immediately squeeze and then release throttle trigger to release fast idle throttle latch, otherwise severe brake damage may occur.
Never use fast idle throttle latch for cutting. Use the fast idle throttle latch only in starting. Note: Do not increase engine speed while chain brake is locked.
Severe brake damage will result.
Starting Warm Engine
Make sure the bar and chain are free from any obstruction when starting the chain saw.

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1. Move chain brake lever fully FORWARD to LOCK chain brake before starting.
2. Confirm there is fuel and chain oil in the tanks.
3. Securely hold the chain saw as shown and pull starter handle.

OPERATION
Chain Brake Locked

4. Choke (A) may be used if necessary, but after first starting sound, squeeze throttle trigger to release choke to OPEN and return engine to idle.

Note: If engine does not start

after 5 pulls, use cold start

procedure.

Note: Do not increase engine

speed while chain brake is locked. Severe brake damage will

result.

Running

The saw chain should not move at idle, otherwise serious personal injury may result.
Note: If saw chain moves adjust carburetor according to "Carburetor Adjustment" instructions in this manual, or see your dealer.

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1. After engine starts, allow it to return to idle and warm up before using.

CS-3510

2. Move chain brake lever fully REARWARD to UNLOCK chain brake.

Unlock Chain brake

3. Squeeze throttle trigger (A) gradually and increase engine speed.

4. The chain starts running when the engine reaches clutch engagement speed (see technical data page).

5. Confirm proper acceleration and lubrication of chain and bar.

6. Do not run the engine at high

speed unnecessarily.

7. Be sure that saw chain stops moving when throttle trigger is released.

Stopping
1. Release throttle trigger (A) and allow engine to idle.
2. Push the momentary stop switch (B) "DOWN" until the engine stops.
Note: If engine does not stop, pull choke control knob out fully to stop engine.

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OPERATION

Note: Return the unit to your authorized dealer to check and repair stop switch before starting the engine again.

Checking Chain Tension
Chain tension should be checked frequently during work and corrected as necessary.

Do not operate with a loose chain.
Chain Lubrication Test
Hold the chain just above a dry surface and open the throttle to half speed for 30 seconds. A thin line of "thrown" oil should be seen on the dry surface.

Cutting Instructions
General
This chain saw is designed for cutting wood. Do not cut metal, plastic or any non-wood material.
Wear suitable hearing protection such as earmuffs or earplugs to

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protect against objectionable or uncomfortable loud

noises.

Do not let the tip of the

bar touch anything while

the engine is running. At

cutting speed the chain is

moving at a high rate of

speed. Should the tip contact a limb or log while

Kickback

the chain is moving, the

tip will be pushed upward

with considerable force.

This is known as kickback. Avoid it!

In all circumstances the operation of the chain saw is a one-man job. It is difficult at times to take care for your own safety, so don't assume the responsibility for a helper as well. After you have learned the basic techniques of using the saw, your best aid will be your own good common sense.

The accepted way to hold the saw is to stand to the left of the saw with your left hand on the front handle and your right hand on the rear handle so you can operate the throttle trigger with your right index finger. Before attempting to fell a tree, cut some small logs or limbs. Become thoroughly familiar with the controls and the responses of the saw.

Start the engine, see that it is running properly. Squeeze the trigger to open the throttle wide open and start the cut. If the chain is properly sharpened, the cutting should be relatively effortless. It is not necessary to press down hard to make the saw cut. Pushing the saw too hard will slow the engine and cutting will actually be more difficult.

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OPERATION

Sap from palm trees may corrode metal parts unless proper saw maintenance is performed. Make sure to clean metal parts from palm sap immediately after use. · Remove sprocket cover. Clean wood chips and sawdust from cover and
engine crankcase. · Never use metal tools for cleaning which can scratch the metal paint and
allow corrosion to develop. · Clean sap accumulation from metal parts with cloth and warm water with
soap. · Rinse with clean water and dry metal surfaces. · Apply a light coating of engine or bar and chain oil to metal parts after
they are cleaned. · Install and properly tension guide bar and chain. Run engine for one
minute alternating engine speed between full throttle for 5 seconds and idle for 5 seconds to coat metal parts with additional protective chain oil.
Do not run a chainsaw not under cutting load at wide open throttle longer than 5 seconds or engine damage can occur.
Keep chain properly tensioned during operation to prevent the chain from jumping out of the guide bar rail slot and damaging metal engine parts.
Felling The Tree
A falling tree can seriously damage anything it may hit - a car, a house, a fence, a power line, or another tree. There are ways to make a tree fall where you want it, so first decide where that is!

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Before cutting, clear the area around the tree. You will need good footing while working and you should be able to work the saw without hitting any obstacles. Next, select a path of retreat. When the tree begins to fall you should retreat away from the direction of fall at a 45-degree angle and at least 3 m (10 feet) from the trunk to avoid the trunk kicking back over the stump.

Direction of fall

3 m (10 feet) Retreat
45° 45°

Retreat

Not this way

Begin the cut on the side to

which the tree is to fall. Cut a notch about 1/3 of the way into the tree. The position of this notch is important since the

Direction of fall 5 cm (2 in.)

Hinge

tree will try to fall "into" the notch. The felling cut is made

First cut

Felling cut

on the side opposite the notch

and at a level about 5 cm (2

in.) above the bottom of the

Notch

notch. Do not try to cut through to the notch with the felling cut. Second cut

5 cm (2 in.)

The remaining wood between

the notch cut and felling cut

about 5 cm (2 in.) will act as a hinge when the tree falls,

One-third tree diameter

guiding it in the desired

direction. When the tree starts to fall, kill the engine, place the saw on the

ground and make your retreat quickly.

To fell big trees with a diameter

exceeding twice the bar length, start the notching cuts from one side and

draw the saw through to the other

side of the notch. Start the back cut

on one side of the tree, pivoting the

saw through to form the desired hinge on that side. Then remove the

saw for the second cut. Insert the

saw in the first cut, very carefully so

as not to cause kickback. The final

cut is made by drawing the saw forward in the cut to reach the hinge.

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Limbing Limbing a fallen tree is much the same as bucking. Never stand on the tree that you are limbing. When limbing, caution is the word. Be careful of the tip touching other limbs. Always use both hands.
Don't cut with the saw overhead or aligned vertically with your body. If the saw should kickback, you may not have enough control to prevent possible injury.

OPERATION

Bucking Bucking is the sawing of a log or fallen tree into smaller pieces. There are a few basic rules which apply to all bucking operations. · Keep both hands on the handles
at all times. · Support logs if possible. · When cutting on a slope or
hillside, always stand uphill.

Finish cut

Uphill Position

First cut Support

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Keep in mind that the wood is heavy and that it will bend and pinch the saw if improperly supported. The trunk will weaken at the point where you make the cut unless the tree is lying on perfectly flat ground or supported as shown. If you make the cut with the tree on the ground, don't let the saw's chain dig into the earth; it is harmful for the saw, and you stand a good chance of being struck by flying debris.

When the bar nose hits another tree, etc.

To cut the trunk, use the bucking and two-cut sequence shown. The first cut should be no deeper than one-third the trunk diameter.

Chain And Guide Bar Combination
The following combinations are recommended for model CS-3510.

Guide Bar

Length mm (in.)

ECHO Part No. Low-kickback

356 (14)

14A0CD3752

406 (16)

16A0CD3757

Saw Chain

Pitch mm (in.)

Type

9.53 (3/8) 9.53 (3/8)

91PX 91PX

Links
52 57

Use of replacement saw chain and/or guide bar other than that specified, or operation without the optional Kick GuardTM in place, may cause severe kickback resulting in serious injury.

Chain and guide bar gauge size must be identical. Use Bar/Chain combinations shown in table above.

Kick GuardTM
(Optional) To purchase an optional Kick GuardTM contact your ECHO dealer. For the name of the ECHO dealer nearest you, Call: 1-800-432-ECHO (3246) or on the web at www.echo-usa.com

Guide Bar
(Low-kickback) 40

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Replacement guide bars. The following guide bars may be considered to have equivalent kickback energy. · Sprocket nose guide bars of the same length and nose radius, same pitch
and having the same number of teeth. · Hard nose guide bars of the same length and nose radius as a sprocket
nose bar.

Saw Chain
(Low-kickback)

Only use saw chain designated as, "LOW-KICKBACK," that meets ANSI B175.1 or CSA Z62.1, .3 Standard when tested on the representative sample of chain saws below 3.8 C.I.D., and ECHO guide bar specified.
MAINTENANCE

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Your unit is designed to provide many hours of trouble free service. Regular scheduled maintenance will help your unit achieve that goal. If you are unsure or are not equipped with the necessary tools, we recommend that you take your unit to a Servicing Dealer for maintenance. To help you decide whether you want to DO-IT-YOURSELF or have the Dealer do it, each maintenance task has been graded. If the task is not listed, see your Dealer for repairs.

The use of emission control components other than those specifically designed for this unit is a violation of federal law.
Skill Levels
Level 1 = Easy to do. Common tools may be required. Level 2 = Moderate difficulty. Some specialized tools may be required. Level 3 = See your dealer. Click HERE or go to http://www.echo-usa.com/products/maintenance-kit or HERE https://www.shindaiwa-usa.com/you-can.aspx For information about maintenance kits.
Maintenance Intervals

Component / System
Daily or Before Use Air Filter Automatic Oiler Oil Filter Fuel System 42

Maintenance Procedure

Req'd Skill Level

Inspect / Clean * Inspect Inspect Inspect 1

1 1 1 1
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Component / System

Maintenance Procedure

Req'd Skill Level

Guide Bar & Sprocket Nose Inspect / Clean *

Saw Chain

Inspect / Sharpen / Replace / Tensioning *

Sprocket

Inspect / Replace *

Cooling System

Inspect / Clean

Recoil Starter Rope

Inspect / Clean *

Screws / Nuts / Bolts

Inspect / Tighten / Replace *

Lifting Hook

Inspect2

Every Refuel

Fuel System

Inspect 1

Guide Bar & Sprocket Nose Inspect

3 Months

Air Filter

Replace *

Oil Filter

Inspect / Replace *

Fuel Filter

Inspect *

Fuel Cap Gasket

Inspect *

Spark Plug

Inspect / Clean / Replace *

Muffler Spark Arrestor

Inspect/Clean/Replace *

Cylinder Exhaust Port

Inspect / Clean / De-carbon

Yearly

Fuel Filter

Inspect / Replace *

Fuel Cap Gasket

Replace *

IMPORTANT NOTE - Time intervals shown are maximum. Actual use and your experience will determine the frequency of required maintenance. MAINTENANCE PROCEDURE NOTES: 1 Low evaporative fuel tanks DO NOT require regular maintenance to maintain emission integrity.

2 Model dependent

* Replacement is recommended based on the finding of damage or wear during inspection.

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Carburetor Adjustment
Every unit is run at the factory and the carburetor is set in compliance with Emission Regulations. In addition, the carburetor is equipped with "H" (High Speed) and ("L" (Low Speed) needle adjustment limiters that prevent settings outside acceptable limits. Engine Break-In New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required. High Altitude Operation This engine has been factory adjusted to maintain satisfactory starting and durability performance up to 1,100 feet above sea level (ASL) (96.0 kPa). To maintain proper engine operation above 1,100 feet ASL the carburetor might need to be adjusted by an authorized service dealer.

If the engine is adjusted for operation above 1,100 feet ASL, the carburetor must be re-adjusted when operating the engine below 1,100 feet ASL, otherwise severe engine damage can result.
1. Before adjusting carburetor clean or replace air filter and muffler "Spark Arrestor Screen".
2. Make sure the bar and chain are properly adjusted. 3. Start engine and run several minutes to bring to operating temperature.
Flash choke twice during warm-up to clear any air from the fuel system. 4. Stop engine. Turn "H" High Speed needle counterclockwise (CCW) to
stop. Turn "L" Low Speed needle midway between full clockwise (CW) stop and CCW stop. 5. Idle Speed Adjustment: · Start engine, turn Idle Speed Adjustment Screw "T" CW until the saw
chain begins to move, then turn screw out CCW until the saw chain stops moving. Turn screw out, CCW, an additional 1/4 turn.

When carburetor adjustment is completed, the saw chain should not move at idle, otherwise serious personal injury can result.

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6. Accelerate to full throttle for 2 - 3 seconds to clear any excess fuel in the engine, then return to idle. Accelerate engine to full throttle to check for smooth transition from idle to high speed. If engine hesitates turn "L" needle CCW 1/8 turn and repeat acceleration. Continue adjustment until smooth acceleration results.
7. Check idle speed and reset if necessary as described in item 5. If a tachometer is available idle speed should be set to value listed on specifications page.

When starting, idling adjustment speed should be adjusted to prevent the saw chain from moving. When you experience trouble with the carburetor, contact your dealer.

Air Filter

1. Check before every use.

2. CLOSE choke ( ).

3. Press hand guard FORWARD and LOCK chain brake.

4. Release the cylinder cover latches (A) and remove cylinder cover (B).

5. Lift the tabs (C) on the air filter and remove the air filter (D).

6. Lightly brush dust off air filter, or clean with compressed air, or replace the air filter.

7. Install air filter and cylinder cover, engage latches.

Spark Plug

· Check periodically.

· The standard spark gap is 0.65 mm (0.026 in.).

· Fastening torque: 13-17 N·m (110-150 in·lbf).

1. Remove cylinder cover and remove spark plug.

0.65 mm (0.026 in.)

2. Correct the spark gap if it is wider or narrower than the standard gap.

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Check Fuel System
· Check before every use. · After refueling, make sure fuel does not leak from around fuel pipe, fuel
grommet or fuel tank cap. · In case of fuel leakage there is a danger of fire. Stop using the machine
immediately and request your dealer to inspect or replace.

Fuel Filter

· Check periodically.

· Do not allow dust to enter fuel tank.

· A clogged filter (A) will cause difficulty in starting engine or abnormalities in engine performance.

1. Pull Fuel Filter (A) out through gas port, and inspect Fuel Filter.

Do not damage fuel line while removing Fuel Filter (A) from tank. 2. When the Fuel Filter (A) is dirty, replace it as follows: 3. Do not remove the wire coil clamp to remove the Fuel Filter (A). Pinch
the Fuel Filter with the fingers on one hand and the fuel line with the other hand. Pull and twist slightly to separate. 4. Install the new Fuel Filter (A) with the reverse action. 5. When the inside of the fuel tank is dirty, rinse the tank out with gasoline to clean it. Note: Federal EPA regulations require all model year 2012 and
later gasoline powered engines produced for sale in the United States to be equipped with a special low permeation fuel supply hose between the carburetor and fuel tank. When servicing model year 2012 and later equipment, only fuel supply hoses certified by EPA can be used to replace the original equipment supply hose. Fines up to $37,500 may be enforced for using an un-certified replacement part.

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Oil Filter

· Check periodically.

· Do not allow dust to enter into oil tank.

· A clogged oil filter (A) will affect the normal lubricating system.

1. Remove the oil cap (B) and pull oil filter out through oil port nspect oil filter (A).

A B

2. If the oil filter (A) is dirty, wash it in gasoline or replace it as follows:

3. Do not remove the wire coil clamp to remove the oil filter (A). Pinch the oil filter with the fingers on one hand and the line with the other hand. Pull and twist slightly to separate.

4. Install the new oil filter (A) with the reverse action.

5. When the inside of the tank gets dirty, rinse the tank out with gasoline to clean it.

Guide Bar

1. Clean before using.

2. Clean the groove (A) of the guide

bar with a small screwdriver.

3. Clean oil holes (B) with a wire.

4. Invert guide bar periodically.

5. Clean the bar mount area before

installing of the bar.

Sprocket
· A damaged sprocket will cause premature damage or wear of saw chain.
· When the sprocket has worn 0.5 mm (0.020 in.) or more, replace it.
· Check sprocket when you install new chain. Replace it if worn.

Worn: 0.5 mm (0.020 in.)

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Some tree sap and resins are corrosive. Thoroughly wash the guide bar and sprocket areas after each use, then coat metal parts with light oil.

Cooling System Cleaning
· Check periodically. · Clogged fins will result in poor
engine cooling. 1. Remove cylinder cover. 2. Use compressed air or wooden
tool to remove dirt and dust from between fins to let cooling air pass easily.

Cylinder fins

Spark Arrestor Muffler
· The spark arrestor muffler controls the exhaust noise and prevents hot, glowing particles of carbon from leaving the muffler.
· Make sure the spark arrestor screen is in good repair and properly seated in the muffler.
· Certain internal combustion engines operated on forest, brush, and/or grass-covered areas in the states of Washington, Oregon, Idaho, California, Minnesota, New Jersey and Maine, are required to be equipped with a spark arrestor.
This requirement also applies to all U.S. Forest Service lands. In some of these areas, the spark arrestor system must be certified per USDA Forest Service Regulation SAE J335. Check with your local or state authorities for specific regulations in your area. Failure to follow these requirements is a violation of the law.

Spark Arrestor Screen

Carbon deposits in muffler will cause drop in engine output and overheating. Spark arrestor screen must be checked periodically.

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MAINTENANCE

1. Remove air cleaner cover and remove spark plug lead.
2. Remove spark arrestor cover screw (A), spark arrestor cover(B) and screen (C) from muffler (D) body.
3. Clean carbon deposits from muffler components.

D C B
A

4. Replace screen if it is cracked, or has holes burned through.

5. Assemble components in reverse order.

Note: When cleaning carbon deposit, be careful not to damage the catalytic element inside muffler.

Exhaust Port Cleaning
Level 2.

Parts Required: As needed: Muffler gasket
1. Remove cylinder cover and remove spark plug lead.
2. Place piston at top dead center. 3. Remove spark arrestor cover
and screen. 4. Remove muffler screws (A) and
muffler body (B) and gasket (C). Check parts for wear or damage, and replace if necessary.

C B A

Never use a metal tool to scrape carbon from the exhaust port. Do not scratch the cylinder or piston when cleaning the exhaust port. Do not allow carbon particles to enter the cylinder.
5. Use a wood or plastic scraping tool to clean deposits from cylinder exhaust port.
6. Install muffler. Tighten muffler mounting bolts (or nuts) to 7 - 9 N·m (60- 80 in·lbf).
7. Install cylinder cover and attach spark plug lead.

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8. Start engine, and allow unit to warm up at idle for several minutes. 9. Stop engine, and re-tighten mounting bolts (or nuts) to 7 - 9 N·m (60-80
in·lbf). 10. Install guide bar and chain. Adjust chain tension. 11. Start engine and check for exhaust leaks between muffler and cylinder
head. Stop engine if leak is found and correct problem before operating chain saw.

Setting The Saw Chain

Drive Link

Preset Tie Strap

Left Hand Cutter

Tie Strap Right Hand Cutter

Guard Link

Top Plate
Side Plate
Depth Gage

Important points for proper maintenance of saw chain: · Keep the cutters sharp at all times. · Keep the left and the right cutters properly aligned. · Note that blunt or irregular cutters will result in poor cutting performance,
increased vibration of chains and premature breakage of the saw chain. · Drive link serves to remove
sawdust from the groove of the guide bar. Keep the lower edge of the drive link sharp where indicated.

Sharpen lower edge

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Setting Saw Chain · For setting saw chain, round file
(4.0 mm [5/32 in.] diam.) and flat file are used. · Push file as shown.

MAINTENANCE
30° Keep this angle

· To keep correct position and correct angle, use a file holder.
· Hold the file horizontally.

90°

· Place the depth gauge tool firmly

on guide bar so that depth gauge

protrudes. Then file top of depth

1/5

gauge with the flat file until flat with

top of the depth gauge tool.

· One fifth of the file diameter remains above cutter edge.

· Be sure to round off the front edge of the depth gauge.

Depth gauge tool

· Properly filed cutters are shown in illustration.

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· When setting of the chain is finished, soak it in oil and wash away filings completely before using.

CS-3510
55°

30° Top plate filing angle · When chain has been filed on the bar, supply sufficient oil to it, move the chain slowly to wash away the filings before using again.

Side plate angle 0.64 mm (0.025 in.)

· If the chain saw is operated with filings clogged in the groove, the saw chain and the guide bar will be damaged prematurely.

· If the saw chain becomes soiled with resin, for instance, clean it with kerosene and soak in it oil.

Parallel Depth gauge

To sharpen other chains, follow chain manufacturer's instructions.

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TROUBLESHOOTING

TROUBLESHOOTING

ENGINE PROBLEM TROUBLESHOOTING CHART

Problem Check

Status

Cause

Remedy

Engine starts hard or

Fuel at carburetor

No fuel at carburetor

Fuel strainer or Clean or replace

fuel line

obstructed

See your dealer

Engine does not start

No fuel at cylinder

Carburetor

See your dealer

Engine starts hard

Fuel at cylinder

Muffler wet with fuel

OPEN choke

Fuel mixture too rich

Clean or replace air filter Adjust carburetor

See your dealer

Engine does not start
Engine runs, but dies or

Spark at end of plug wire Spark at plug Air filter
Fuel filter

No spark
Air filter dirty Fuel filter dirty

Incorrect gap Covered with carbon - Fouled with fuel - Plug defective
Normal wear Contaminants or residue in fuel

Adjust to 0.65mm (0.026 in.) Clean or replace plug
Clean or replace Replace filter or replace fuel

Engine does not accelerate properly
Engine runs, but dies
or
Engine does not accelerate properly

Fuel vent
Spark plug Carburetor Cooling system Spark arrestor screen

Fuel vent plugged
Plug dirty or worn Improper adjustment Cooling system dirty or plugged Spark arrestor screen plugged

Contaminated fuel
Normal wear Vibration Extended operation in dirty or dusty locations Normal wear

Clean or replace Clean and adjust or replace Adjust Clean
Replace

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ENGINE PROBLEM TROUBLESHOOTING CHART

Problem Check

Status

Cause

Remedy

Engine does not crank

N/A

Internal engine problem

See your dealer

Fuel vapors are extremely flammable and may cause fire and/or explosion. Never test for ignition spark by grounding spark plug near cylinder plug hole, otherwise serious personal injury may result.

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STORAGE
Storage After Use

STORAGE

Momentary STOP Switch automatically returns to RUN position. Engine can start unintentionally. Always remove spark plug lead from spark plug before assembling or performing maintenance procedures. Serious personal injury can result. · Inspect and adjust every part of the chain saw.
· Completely clean every part and repair if necessary. · Apply thin coating of oil on metal parts to prevent rust. · Remove chain and guide bar.
· Drain fuel tank completely. Press purge bulb 6-7 times to remove remaining fuel from carburetor then drain the tank again. Close choke, start and run the engine until it stops due to lack of fuel.
· Allow engine to cool. Remove the spark plug lead from the spark plug. Remove the spark plug. Pour 7 cc (0.25 oz.) of fresh, clean, two-stroke engine oil into the cylinder through the spark plug hole.
· Store in a dry area, free from dust.

Do not store in an enclosure where fuel fumes may accumulate or reach an open flame or spark.
Do not lend or rent your chain saw without the Operator's Manual. Note:
· For future reference, you should keep this Operator's Manual. · If this Operator's Manual becomes illegible or is lost, please contact
your ECHO dealer, or go to www.echo-usa.com.

X7503360201

SPECIFICATIONS
SPECIFICATIONS

CS-3510

Model Length Width Height Dry weight Engine Displacement Bore Stroke Compressions ratio Carburetor Spark plug Fuel tank capacity Fuel Gasoline
Oil
Oiling system Chain oil capacity Starter system Clutch Sprocket type Chain brake Idle speed Clutch engagement speed Wide open throttle speed (W.O.T.) Chain tensioner Guide bar Saw chain
Standard features

CS-3510 386 mm (15.2 in.) 233 mm (9.2 in.) 271 mm (10.7 in.) 3.7 kg (8.2 lb.) Without chain and guide bar Air-cooled two-stroke single cylinder 34.4 mL (2.1 cu. in.) 40.0 mm (1.570 in.) 27.4 mm (1.08 in.) 7.4:1 Diaphragm type NGK BPMR8Y (Gap 0.65 mm [0.026 in.]) 280 mL (9.47 US. fl. oz.) 50:1 Use 89 octane unleaded. Do not use fuel containing methyl alcohol, more than 10% ethyl alcohol or 15% MTBE. Do not use alternative fuels such as E-15 or E85. ISO-L-EGD (ISO/CD 13738) and JASO M345-FD two-stroke, air-cooled engine oil. automatic oiler 230 mL (7.78 US. fl. oz.) Automatic rewind starter Centrifugal type Spur type, 6-tooth, 3/8 in. pitch Automatic band brake type 3,000 RPM 4,500 RPM 13,300 RPM
Side access system 14, 16 in 91PX Front hand guard, Rear hand guard, Anti-vibration device, Throttle control lockout, Chain catcher, Spark arrestor muffler

* Technical data subject to change without notice.

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CS-3510
NOTES

NOTES

X7503360201

PRODUCT REGISTRATION
PRODUCT REGISTRATION

CS-3510

Thank you for choosing ECHO Power Equipment Please go to http://www.echo-usa.com/Warranty/Register-Your-ECHO to register your new product on-line. It's FAST and EASY! NOTE: your information will never be sold or misused by ECHO, Incorporated. Registering your purchase enables us to contact you in the unlikely event of a service update or product recall, and verifies your ownership for warranty consideration. If you do not have access to the Internet, you can complete the form below and mail to: ECHO Incorporated, Product Registration, PO Box 1139, Lake Zurich IL 60047.

X7503360201

CS-3510

PRODUCT REGISTRATION

X7503360201

C82015001001 - C82015999999
ECHO INCORPORATED
400 Oakwood Road Lake Zurich, IL 60047 www.echo-usa.com

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